/* ============================================================
   Link Management System — Design System
   Theme: Dark Ocean + Soft Gray Light Mode
   ============================================================ */

/* ── CSS Variables ── */
:root, [data-theme="dark"] {
  --bg-primary: #050d18;
  --bg-secondary: #081422;
  --bg-card: #0b1a2e;
  --bg-card-hover: #102440;
  --bg-input: #070f1c;
  --accent: #00d4ff;
  --accent-hover: #00b8e6;
  --accent-secondary: #0099cc;
  --accent-glow: rgba(0,212,255,0.15);
  --accent-glow-strong: rgba(0,212,255,0.3);
  --text-primary: #e8f4f8;
  --text-secondary: #8ba4b5;
  --text-muted: #5a7a8a;
  --border: rgba(0,212,255,0.12);
  --border-strong: rgba(0,212,255,0.25);
  --success: #00e68a;
  --success-bg: rgba(0,230,138,0.12);
  --warning: #ffb84d;
  --warning-bg: rgba(255,184,77,0.12);
  --danger: #ff6b6b;
  --danger-bg: rgba(255,107,107,0.12);
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.25s ease;
  --glass: rgba(19,42,66,0.6);
  --glass-border: rgba(0,212,255,0.08);
  --sidebar-w: 240px;
  --navbar-h: 0px;
  --mobile-topbar-h: 52px;
}

[data-theme="light"] {
  --bg-primary: #f0f2f5;
  --bg-secondary: #e8eaed;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f6f8;
  --bg-input: #f5f6f8;
  --accent: #0088aa;
  --accent-hover: #006d88;
  --accent-secondary: #00667a;
  --accent-glow: rgba(0,136,170,0.1);
  --accent-glow-strong: rgba(0,136,170,0.2);
  --text-primary: #2d3748;
  --text-secondary: #718096;
  --text-muted: #a0aec0;
  --border: rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.15);
  --success: #38a169;
  --success-bg: rgba(56,161,105,0.1);
  --warning: #d69e2e;
  --warning-bg: rgba(214,158,46,0.1);
  --danger: #e53e3e;
  --danger-bg: rgba(229,62,62,0.1);
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.1);
  --glass: rgba(255,255,255,0.7);
  --glass-border: rgba(0,0,0,0.06);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea {
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  transition: all var(--transition);
  outline: none;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
::selection { background: var(--accent); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ── Mobile Topbar (hamburger, only on mobile) ── */
.mobile-topbar {
  display: none;
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--mobile-topbar-h);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--glass-border);
  align-items: center; justify-content: space-between;
  padding: 0 1rem; z-index: 100;
}
.mobile-menu-btn, .mobile-theme-btn {
  background: none; border: none; color: var(--text-primary);
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); cursor: pointer;
}
.mobile-menu-btn:hover, .mobile-theme-btn:hover { background: var(--accent-glow); }
.mobile-topbar-title { font-weight: 700; font-size: 1rem; color: var(--text-primary); }

/* Theme Toggle */
.theme-toggle {
  background: none; border: 1px solid var(--border); color: var(--text-secondary);
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* User Menu */
.user-menu { position: relative; }
.user-menu-btn {
  display: flex; align-items: center; gap: 0.5rem;
  background: none; border: 1px solid var(--border); color: var(--text-primary);
  padding: 0.35rem 0.75rem 0.35rem 0.35rem;
  border-radius: 50px; transition: all var(--transition);
}
.user-menu-btn:hover { border-color: var(--accent); background: var(--accent-glow); }
.avatar-sm { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; background: var(--bg-secondary); }
.user-name { font-size: 0.85rem; font-weight: 500; }
.user-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); min-width: 200px;
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: all var(--transition); z-index: 110;
}
.user-dropdown.show { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-header { padding: 0.75rem 1rem; }
.dropdown-name { display: block; font-weight: 600; font-size: 0.9rem; }
.dropdown-role { font-size: 0.75rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; }
.dropdown-divider { height: 1px; background: var(--border); margin: 0; }
.dropdown-item {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.6rem 1rem; color: var(--text-primary);
  font-size: 0.85rem; transition: background var(--transition);
}
.dropdown-item:hover { background: var(--accent-glow); color: var(--accent); }
.dropdown-danger:hover { background: var(--danger-bg); color: var(--danger); }

/* ── Sidebar (MindMap-style, full height, no top-navbar) ── */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--glass-border);
  display: flex; flex-direction: column;
  transition: transform var(--transition);
  z-index: 90; overflow-y: auto; overflow-x: hidden;
}
/* Brand / Logo */
.sb-brand {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 0.85rem 0.75rem;
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
}
.sb-logo {
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--text-primary); font-weight: 700; font-size: 1rem;
  text-decoration: none;
}
.sb-logo-icon {
  width: 34px; height: 34px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  border-radius: var(--radius-sm); color: #fff;
}
.sb-close { display: none; background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; border-radius: 6px; }
.sb-close:hover { background: var(--danger-bg); color: var(--danger); }
/* User info */
.sb-user {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--glass-border); flex-shrink: 0;
}
.sb-avatar { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.sb-user-info { display: flex; flex-direction: column; min-width: 0; }
.sb-username { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sb-role { font-size: 0.7rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; }
/* Nav */
.sb-nav { flex: 1; padding: 0.75rem 0.6rem; }
.sb-section-title {
  display: block; font-size: 0.62rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text-muted); padding: 0 0.5rem; margin-bottom: 0.3rem;
}
.nav-item {
  display: flex; align-items: center; gap: 0.65rem;
  padding: 0.55rem 0.65rem; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.87rem; font-weight: 500;
  transition: all var(--transition); margin-bottom: 2px;
  text-decoration: none; background: none; border: none; width: 100%; cursor: pointer;
}
.nav-item:hover { background: var(--accent-glow); color: var(--text-primary); }
.nav-item.active {
  background: linear-gradient(135deg, var(--accent-glow-strong), var(--accent-glow));
  color: var(--accent); font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent);
}
.nav-logout:hover { background: var(--danger-bg); color: var(--danger); }
/* Bottom actions */
.sb-bottom {
  padding: 0.6rem; border-top: 1px solid var(--glass-border); flex-shrink: 0;
}

/* ── App Layout ── */
.app-layout { display: flex; min-height: 100vh; }
.main-content {
  flex: 1; margin-left: var(--sidebar-w);
  padding: 1.5rem; transition: margin var(--transition);
  max-width: 100%;
}
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.5); z-index: 85;
}

/* ── Page Header ── */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem;
}
.page-title { font-size: 1.5rem; font-weight: 700; }
.page-subtitle { color: var(--text-secondary); font-size: 0.85rem; margin-top: 0.2rem; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1.1rem; border-radius: var(--radius-sm);
  font-size: 0.85rem; font-weight: 600; border: none;
  transition: all var(--transition); white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  color: #fff; box-shadow: 0 2px 12px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow-strong); }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); background: var(--accent-glow); }
.btn-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid transparent; }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.78rem; }
.btn-icon { padding: 0.45rem; border-radius: var(--radius-sm); background: none; border: 1px solid var(--border); color: var(--text-secondary); }
.btn-icon:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  min-width: 0;
  overflow: hidden;
}
.card:hover { border-color: var(--border-strong); }
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1rem; padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.card-title { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); }

/* ── Stat Cards ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; width: 100%; box-sizing: border-box; }
.stat-card {
  background: var(--bg-card); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 1.25rem;
  box-shadow: var(--shadow); transition: all var(--transition);
  position: relative; overflow: hidden;
}
.stat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  opacity: 0; transition: opacity var(--transition);
}
.stat-card:hover::before { opacity: 1; }
.stat-card:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.stat-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 0.75rem;
}
.stat-icon.blue { background: var(--accent-glow); color: var(--accent); }
.stat-icon.green { background: var(--success-bg); color: var(--success); }
.stat-icon.orange { background: var(--warning-bg); color: var(--warning); }
.stat-icon.red { background: var(--danger-bg); color: var(--danger); }
.stat-value { font-size: 1.75rem; font-weight: 800; line-height: 1.2; }
.stat-label { font-size: 0.78rem; color: var(--text-secondary); margin-top: 0.2rem; }

/* ── Tables ── */
.table-container { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--glass-border); }
table { width: 100%; border-collapse: collapse; }
thead th {
  background: var(--bg-secondary); color: var(--text-secondary);
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.5px; padding: 0.75rem 1rem; text-align: left;
  border-bottom: 1px solid var(--border);
}
tbody td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
tbody tr { transition: background var(--transition); }
tbody tr:hover { background: var(--accent-glow); }
tbody tr:last-child td { border-bottom: none; }

/* ── Badges ── */
.badge {
  display: inline-flex; align-items: center; gap: 0.3rem;
  padding: 0.2rem 0.6rem; border-radius: 50px;
  font-size: 0.7rem; font-weight: 600;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--accent-glow); color: var(--accent); }

/* ── Modal ── */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  z-index: 200; align-items: center; justify-content: center;
  padding: 1rem;
}
.modal-overlay.show { display: flex; }
.modal {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); width: 100%; max-width: 560px;
  max-height: 85vh; overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.25s ease;
}
@keyframes modalIn { from { opacity: 0; transform: scale(0.95) translateY(10px); } to { opacity: 1; transform: scale(1) translateY(0); } }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem; border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 1.1rem; font-weight: 700; }
.modal-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 1.5rem; padding: 0; line-height: 1; cursor: pointer;
}
.modal-close:hover { color: var(--danger); }
.modal-body { padding: 1.25rem; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: 0.5rem;
  padding: 1rem 1.25rem; border-top: 1px solid var(--border);
}

/* ── Form Groups ── */
.form-group { margin-bottom: 1rem; }
.form-label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 0.35rem; }
.form-hint { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.25rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238ba4b5' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.75rem center; padding-right: 2rem; }

/* ── Toast Notifications ── */
.toast-container { position: fixed; top: calc(var(--navbar-h) + 1rem); right: 1rem; z-index: 300; display: flex; flex-direction: column; gap: 0.5rem; }
.toast {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.75rem 1rem;
  box-shadow: var(--shadow-lg); display: flex; align-items: center; gap: 0.6rem;
  font-size: 0.85rem; min-width: 280px; max-width: 400px;
  animation: toastIn 0.3s ease;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
@keyframes toastIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* ── Copy Button ── */
.copy-btn { position: relative; }
.copy-btn.copied::after {
  content: 'Copied!'; position: absolute; top: -28px; left: 50%;
  transform: translateX(-50%); background: var(--success); color: #fff;
  font-size: 0.7rem; padding: 0.2rem 0.5rem; border-radius: 4px;
  animation: fadeOut 1.5s ease forwards;
}
@keyframes fadeOut { 0%,70% { opacity: 1; } 100% { opacity: 0; } }

/* ── Empty State ── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }
.empty-state svg { margin-bottom: 1rem; opacity: 0.3; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 0.5rem; }

/* ── Charts Container ── */
.chart-container { position: relative; width: 100%; }
.charts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }

/* ── Skeleton Loading ── */
.skeleton { background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-card-hover) 50%, var(--bg-secondary) 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; border-radius: var(--radius-sm); }
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .charts-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .mobile-topbar { display: flex; }
  .sb-close { display: flex; }
  .sidebar { transform: translateX(-100%); top: 0; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.show { display: block; }
  .main-content { margin-left: 0; padding: 1rem; padding-top: calc(var(--mobile-topbar-h) + 1rem); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .form-row { grid-template-columns: 1fr; }
  .modal { max-width: 100%; margin: 0.5rem; }
  .table-container { font-size: 0.8rem; }
  /* Sembunyikan teks tombol, tampilkan ikon saja pada beberapa elemen di mobile */
  .page-header .btn span.btn-text { display: none; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr !important; gap: 0.65rem; }
  .stat-card { padding: 0.85rem; }
  .stat-value { font-size: 1.3rem; }
  .stat-label { font-size: 0.72rem; }
  .stat-icon { width: 34px; height: 34px; }
}